High pitch whistle for calling animals



March 13, 1956 H. E. LIEBELT 2,737,757

HIGH PITCH WHISTLE FOR CALLING ANIMALS Filed Aug. 5, 1953 INVENTOR.HOWARD E. L/EBELT United States Patent HIGH PITCH WHISTLE FOR CALLINGANIMALS Howard E. Liebelt, Cincinnati, Ohio, assignor to Joseph B.Biederman, Cincinnati, Ohio Application August 5, 1953, Serial No.372,505

1 Claim. (Cl. 46-179) This invention relates to a whistle having a highpitched note which may be heard by a dog or other animal, but which cannot be heard by the human ear.

An object of this invention is to provide a so-called dog whistle havingmeans for adjusting the pitch.

Another object of this invention is to provide a whistle which issubstantially fiat in shape, and naturally fits the contours of themouth.

A further object of this invention is to provide a whistle of this type,which can be easily disassembled for cleaning the component partsthereof.

Another object of this invention is to provide a whistle which may bemanufactured and assembled quickly and inexpensively.

From the following detailed description and the drawing, the above andother objects and features of the invention will be apparent to thosehaving ordinary skill in the art to which it pertains.

In the drawing:

Figure 1 is a plan view showing a whistle constructed in accordance withan embodiment of this invention;

Fig. 2 is a view in section taken on line IIll in Fig. 1;

Fig. 3 is a view in section taken along line IIIIII in Fig. 1;

Fig. 4 is a fragmentary view in bottom plan, looking in the direction ofthe arrows IV IV in Fig. 2; and

Fig. 5 is a perspective view of a pitch adjusting plunger of thewhistle.

In the following detailed description, and the drawing, like referencecharacters indicate like parts.

As shown in the drawing, the whistle includes a hollow body member 10,generally of channel shape, having a Web 12 (Fig. 3) and flanges 13. Oneend of the channelshaped body member is closed by a wall 13a. As shownin Fig. 2, a portion or" the web 12 slopes upwardly to form an inclinedface 14. A cover member 16 is mounted between the flanges of the bodymember at one end thereof, and over the inclined face 14. As shown inFig. 3, the flanges 13 are provided with shoulders 17 on which the covermember rests. The cover member may be held in place on the shoulders 17by means of a metal spring clip 18 which embraces the body member andthe cover to hold the cover member in place on the flanges 13.

The cover member and the body member define an air channel having aportion 18 at the blowing end of the body member 10, of relatively largeflow area and a restricted area portion 19 connected by a portion 21which decreases in flow area from that of portion 18' to that of portion19, because of the sloping face 14. As shown, the air entry end of thewhistle is substantially flat so as naturally to fit the mouth.Indentations or grooves 21a and 211) are formed in the cover member andin the body member, respectively, by means of which the whistle can begripped by the teeth.

The air channel discharges through narrow portion 19 2,737,757 PatentedMar. 13, 1956 against knife edge 22 of a thin metal member or plate 22.The plate.22 spans the flanges of the. body member, fit. An air chamber22a is formed between the plate 22 and the web of the body member. Thelength of the air chamber 22a determines the pitch of the whistle.

and is held in place therebetween by the friction of a press The lengthof the air chamber 22a is controlled by a plunger 23, which is slidablymounted in the air chamber 22a. The plunger is provided with a knurledknob 24 which can be engaged by the thumb so that the plunger may bemoved in and out of air chamber 22a, to alter the pitch. The plunger isprovided with slots 26 forming wings 27 which engage the side of theflanges of the body member with a spring action to hold the plunger inposition. Graduations 28 are provided on the plunger and on the bodymember for ease in determining the proper position of the plunger.

As shown in Figs. 2 and 4, a depression 29 is formed in the back of theweb of the body member, opposite sloping face 14. This depressionprovides a place for a card or piece of paper 31, hearing indicia toidentify the owner of the whistle or the dog which can be called by thewhistle. The depression is covered by a cap 32 of transparent materialwhich is frictionally held in the mouth of the depression and protectsthe indicia-bearing card 31.

As shown in Figs. 1 and 2, a small hole 33 may be formed in one end ofthe body member by means of which the whistle may be hung in anyappropriate place.

When the whistle needs cleaning, the clip 18 is removed, to permitremoval of the cover member 16. After the member 22 and the plunger 23have been removed from the body 10, the parts of the whistle may bethoroughly cleaned.

The knife edge member may be held in proper forward position by lugs 34formed integrally with the body member and which engage the edge 22.

The body 10, cover member 16 and plunger 23 can be molded from suitableplastic or resinous material.

it will be apparent to those of ordinary skill in the art to which thisinvention pertains, that various modifications may be made in theillustrated embodiment thereof without departing from either the spiritor scope of the invention.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

A high pitch dog whistle having an adjustable volume air chambercomprising a body of channel shape in section, the channel being open atone end, the air chamber being adjacent the other end of the channelmember, a fiat cover for said channel member extending from the open endthereof to approximately the entrance to the air chamber, said channelhaving a wall sloping upwardly from the bottom of the channel member toa point spaced from the under side of said cover and a fiat wallparallel to the flat cover extending from said point to the inner end ofsaid cover, thereby forming an air passage rectangular in shape and ofsmall area in cross section, a fiat metal member covering a portion ofsaid channel member adjacent the inner end of the cover and overlyingthe air chamber, said metal member having a knife edge at the endadjacent the inner end of the cover, said edge being substantially in aplane containing said fiat wall and being spaced a short distance fromthe inner end of said flat wall, and a plug disposed in the air chamberand under said metal member, the plug fitting the chamber closely andbeing adjustable along the chamber for adjusting the volume of the airchamber under said metal member and thereby the pitch of the whistle.

References Cited in the file of this patent UNITED STATES PATENTS 4Leavens June 10, 1941 Friedman; Mar. 18, 1947 Bicocchi Sept. 2, 1952FOREIGN PATENTS Great Britain Sept. 11, 1919 Great Britain Juiy 13, 1937

